Visa Shares and Related Agreement (Details) (USD $)	1 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended			6 Months Ended		0 Months Ended
	Nov. 30, 2009	Mar. 31, 2008	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Visa Class B to Visa Class A Shares Conversion Rate [Member]	Mar. 31, 2012 Visa Class B to Visa Class A Shares Conversion Rate [Member]	Jun. 30, 2011 Visa Class B to Visa Class A Shares Conversion Rate [Member]	Jun. 30, 2011 Visa Class B to Visa Class A Shares Conversion Rate [Member]	Dec. 31, 2011 Visa Class B to Visa Class A Shares Conversion Rate [Member]	Jul. 13, 2012 Subsequent Event [Member] Visa Class B to Visa Class A Shares Conversion Rate [Member]	Jul. 13, 2012 Subsequent Event [Member] Visa USA [Member] Visa Class B to Visa Class A Shares Conversion Rate [Member]
Derivative [Line Items]
Pte-tax gain on redemption of Visa shares		$ 38,500,000
Proceeds fom sle o Visa shares	51,900,000
Gain on sale of Visa shares	51,900,000
Fair value of derivative liability						3,100,000				9,100,000
Visa dposits to ltigation ecrow						1,570,000,000
Settlements pid to drivative cunterparty							9,900,000	4,200,000	1,700,000
Idemnification charge to earnings			4,700,000		1,700,000
Fes payable to the derivative counterparty				466,000
Settlement payment for multi-district interchange litigation											$ 6,600,000,000	$ 4,400,000,000